LBP - Low Back Pressure APPLICATION, R134a Refrigerant, 115V 1 Phase 60Hz / 100V 1 Phase 50Hz 1/2 HP, High Start Torque (HST) 2108 BTU Capacity, 1/2" FLARE (SAE) SUCTION LINE SIZE, 0.25" Sweat (1/4" ODF) DISCHARGE LINE SIZE, Reciprocating Compressor (Model:AJA2419YXA)

HBP - High Back Pressure APPLICATION, R134a Refrigerant, 208-230V 1 Phase 60Hz / 200V 1 Phase 50Hz 1 HP, High Start Torque (HST) 12636 BTU Capacity, 5/8" FLARE (SAE) SUCTION LINE SIZE, 0.3125" Sweat (5/16" ODF) DISCHARGE LINE SIZE, Reciprocating Compressor (Model:AJA4512YXD)